Washing Machine Overfilling, What to do? PLZ READ? my washing mechanism keeps overfilling and the pressure put on the door...

my washing mechanism keeps overfilling and the pressure put on the door cause big flood.
It is an Electra Autowasher AWM 900A

If there is anybody that have experienced this, or fixed something similar, or has this washer and have the manual or ANY Electra wash machine pls pls pls hand over as much info as you can.
Thanks xx
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Answers:    there is a small pipe connected to a chamber, on the lower portion of the drum. this tells the control component how much water is contained by the machine. It is probably blocked near scale and excess detergent. unplug apparatus from mains, and verbs out chamber. other wise the pressure switch at the other shutting of the pipe has faileded, in that colud be a hole in the pipe but you'd find water on the floor
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